Inkjet head and inkjet printer having the same

Abstract

An inkjet head and an inkjet printer having the inkjet head are disclosed. In accordance with an embodiment of the present invention, the inkjet head includes a chamber housing ink and a nozzle, which discharges the ink housed in the chamber. Here, a plurality of inner wall grooves are formed on an inner wall of the nozzle, in which the plurality of inner wall grooves extends in a lengthwise direction of the nozzle. Thus, the inkjet head can discharge big ink droplets at a high frequency by quickly filling the ink in the nozzle after relatively big ink is discharged.

1 . An inkjet head comprising:
 a chamber housing ink; and   a nozzle configured to discharge the ink housed in the chamber,   wherein a plurality of inner wall grooves are formed on an inner wall of the nozzle, the plurality of inner wall grooves extending in a lengthwise direction of the nozzle.   
     
     
         2 . The inkjet head of  claim 1 , wherein the plurality of inner wall grooves are radially disposed on the inner wall of the nozzle. 
     
     
         3 . The inkjet head of  claim 2 , wherein the plurality of inner wall grooves are symmetrically formed about a center of the nozzle. 
     
     
         4 . The inkjet head of  claim 1 , wherein the plurality of inner wall grooves formed on the inner wall of the nozzle are concavo-convex curves continuously formed along the inner wall of the nozzle. 
     
     
         5 . The inkjet head of  claim 1 , wherein the plurality of inner wall grooves are formed to penetrate from the inside to the outside of the chamber. 
     
     
         6 . The inkjet head of  claim 1 , further comprising a piezoelectric body configured to provide pressure to the chamber. 
     
     
         7 . An inkjet printer comprising:
 an inkjet head in accordance with any one of  claims 1  to  6 ; and   an ink supplying unit configured to supply ink to the inkjet head.